A couple has three children : a 14 - year -old daughter and two sons that are 12 and 10 years old.If the mother and daughter are both known to have a genetic disorder what would the the Pedigree of this family look like?

Options

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B.
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D.

Answer

To create the pedigree chart for the family described in the question, we can follow these steps:

### Step 1: Identify the Family Members
- The family consists of a couple (father and mother) and their three children: one daughter (14 years old) and two sons (12 and 10 years old).

### Step 2: Represent the Parents
- In a pedigree chart, males are represented by squares and females by circles.
- We will represent the father as a square (□) and the mother as a circle (○).

### Step 3: Indicate the Children
- The first child is a 14-year-old daughter, represented by a filled circle (●) since she has a genetic disorder.
- The second child is a 12-year-old son, represented by an unfilled square (□) since there is no indication of a genetic disorder.
- The third child is a 10-year-old son, also represented by an unfilled square (□).

### Step 4: Connect the Family Members
- Connect the parents with a horizontal line to indicate they are a couple.
- Draw vertical lines downwards to connect to their children, showing the lineage.

### Step 5: Fill in the Affected Individuals
- Since both the mother and daughter have a genetic disorder, we will fill in the mother’s circle (○) and the daughter’s circle (●) to indicate they are affected.

### Final Pedigree Representation
- The final pedigree chart will look like this:

```
□ (Father)
○ (Mother, filled)
|
-----------------
| | |
●(Daughter) □(Son, 12) □(Son, 10)
```

### Conclusion
- The pedigree chart clearly shows the family structure, indicating which individuals are affected by the genetic disorder.